611139 has 4 divisors (see below), whose sum is σ = 814856. Its totient is φ = 407424.

The previous prime is 611137. The next prime is 611147. The reversal of 611139 is 931116.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 611139 - 2¹ = 611137 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101854 + ... + 101859.

It is an arithmetic number, because the mean of its divisors is an integer number (203714).

2⁶¹¹¹³⁹ is an apocalyptic number.

611139 is a deficient number, since it is larger than the sum of its proper divisors (203717).

611139 is a wasteful number, since it uses less digits than its factorization.

611139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203716.

The product of its digits is 162, while the sum is 21.

The square root of 611139 is about 781.7537975603. The cubic root of 611139 is about 84.8620137196.

The spelling of 611139 in words is "six hundred eleven thousand, one hundred thirty-nine".